Improvement in lubricating compounds



I UNZTE ll. Johnson.

S're rns NATHAN KING AND SYLVESTER J. HILL, OF FRANKLIN, PENNSYLVANIA.

IMPRGVEMENT IN LUBRICATlNG COMPOUNDS-f Specification forming part ofLetters Patent No. 148,568, dated March 17, 1874; application filedFebruary 23, 1874.

To all whom "it may concern:

Be it known that we, NATHAN KING- and SYLV'ESTER J. HILL, of Franklin,in the county of Venango and State of Pennsylvania, have jointlyinvented certain new and useful Improvements in Lubricants and Processfor Making the Same; and we do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use it.

Our invention relates to an improvement in lubricants, and the processfor preparing, manufacturin g, and compoundin gthe same; and consists,essentially, of the elements, proportions, and preparations as willhereinafter appear.

We are aware of the English patent of J. H. Johnson, No. 228 of 1854:,wherein is employed a mixture of bog-oil, talc, plumbago, and lampblack,combined by the influence of heat. We are also aware of the patentgranted to B. Battle, No. 60,989, January 8, 1867, wherein is claimed alubricator composed of animal grease or residuum, plumbago, sulphur,steatite, carburet of magnesia, glue, resin, and hydrate of lime, withor without molasses. These elements are combined under the influence ofheat. \Ve disclaim what might be covered by the inventions referred to,although it is apparent that crude petroleum did not enter into, and wasnot contemplated in, the patent to Battle, and was not generally knownas a lubricant at the time of the patent to J. Neither was it mentionedin said patent. 'e are therefore not aware of any lubricant like untoour within-described article.

Our lubricant consists, essentially, of a mechanical mixture of crudepetroleum or rockoil and plumbago or graphite, whereby two results areaccomplished, first, a lubricant capable of resisting low degrees oftemperature without congealing; second, a superior article as alubricant. 7

We prepare and compound our invention as follows: Take, say, fortygallons of crude petroleum or rock-oil at a ravit of 32 and for everydegree of specific gravity to which it is desired to reduce this oil isadded, say, four pounds of commercial graphite.

The modus operandi of preparing and compounding the oil and graphite isas follows: Commercial graphite is reduced to an impalpable powder byany suitable process of grinding or pulverizin A suitable proportion ofthis, as above set forth, is mechanically mixed by a similar grindingprocess that may be employed in reducing commercial graphite to powder.

We employ no heat in the combination of our invention, but simply minglethe compounds in the mechanical manner referred to until they become sointimately mixed that the graphite is held in suspension withoutundergoing any sensible chemical change, which would impair itslubricating properties. Neither is the oil deteriorated by heat, as isthe case where heat is employed in uniting the ingredients.

When desirable, we propose to add lard-oil to the compound of petroleumand plumbago in suitable proportions toimprove the body of thelubricant. We may add caster-oil for the same purpose, or we may addlard and tallow, also, for the purpose of improving the body of thelubricant.

The object of increasing the body of the lubricant is to accommodate theuse of it to heavier machinery, and may be employed in suitableproportions to render it sufficiently dense for the use intended.

'What we claim as our invention is The combination of graphite orplumbago with mineral and animal oils, or either of the latter, in theproportions and the manner of compounding, substantially as described.

In testimony that we claim the foregoing we have hereunto set our handsthis 20th day of February, 1874.

NATHAN KING. SYLVESTER J. HILL.

Witnesses:

S. P. MoOALMoN'r, J. W. OSBORN.

